GE IC697CMM742-LL Ethernet Module

The General Electric IC697CMM742-LL, also cataloged as the IC697CMM742 Ethernet Interface, operates as a dedicated hardware component for high-speed network communication and Ethernet Global Data (EGD) exchange within GE Fanuc Series 90-70 PLC architectures. This single-slot module enables TCP/IP protocol services, SRTP communications, and real-time data transmission between host CPUs, HMI/SCADA networks, and remote programming software. It plugs directly into the passive backplane to handle deterministic network traffic without imposing execution overhead on the central processor.

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Flash Compatibility

The General Electric IC697CMM742-LL leverages high-speed VMEbus backplane interfacing to maintain deterministic data transmission across the Series 90-70 rack assembly. Up to four IC697CMM742 modules can reside within a single CPU rack to scale overall I/O density and network throughput. The module's pre-loaded firmware Flash architecture allows synchronous execution of configuration-based and logic-based EGD protocols. Firmware compatibility features enable field upgrades via the dedicated RS-485 serial port while backplane noise suppression filters preserve signal integrity during high-volume TCP/IP sweeps.

Frequently Asked Questions

Q: Can all three physical network ports (10BaseT, 10Base2, AUI) on the IC697CMM742-LL be utilized simultaneously?

A: No. The module contains automatic transceiver selection circuitry that detects physical link connectivity and selects only one active network port at a time.

Q: What is the procedure for resetting network communications on the module without cycling main rack power?

A: Press and release the front-panel manual restart pushbutton. This re-initializes internal Ethernet hardware and restarts communication services without disrupting power to the host CPU rack.

Q: What is the function of the internal 1.0 A fuse located on the IC697CMM742-LL circuit board?

A: The 5 x 20mm, 250V, 1.0A slow-acting fuse provides overcurrent protection for the +12 VDC power line supplied to external AUI transceivers.

Field Installation Guidelines

1. Power Verification: Turn off power to the Series 90-70 main CPU rack prior to inserting or removing the communication module to prevent backplane bus faults.
2. Rack Slot Placement: Insert the IC697CMM742-LL into any single available slot within the PLC CPU rack. Align the circuit board with the plastic card guides and press firmly until backplane connectors seat completely.
3. Mechanical Securing: Engage top and bottom faceplate retaining latches, then tighten securing screws to 0.8 Nm (7 in-lb) torque to ensure continuous chassis frame grounding.
4. Network Cabling & Termination: Connect 10BaseT (RJ45), 10Base2 (thin coaxial with 50-ohm end terminators), or AUI transceiver cables to the appropriate front-panel port. Verify cable bend radius limits are respected inside the enclosure.
5. Earth Grounding: Confirm the rack ground bus is tied to cabinet star ground using minimum 14 AWG (2.5 mm sq) wire. The faceplate must establish direct metal-to-metal contact with the grounded rack frame for noise suppression.

es are transferred across the 64-pin DIN 41612 backplane interface to host controllers, drawing 320 mA from the 5 VDC logic bus.

Hardware Specifications

Backplane Bus Communication Velocity & Network Integration

The IC697MDL250F maintains backplane bus communication velocity by performing onboard signal debounce and configurable input filtering (1 ms or 10 ms via hardware DIP switches) prior to driving logic state data across the backplane bus. The 64-pin DIN 41612 connector provides high-integrity backplane bus signaling, while onboard power decoupling via four 47 uF electrolytic capacitors buffers internal voltage rails against field-induced power noise. Dedicated channel optocouplers deliver 1,500 V RMS isolation between external field wiring and internal bus logic tracks, ensuring firmware flash compatibility and logic execution stability across all Series 90-70 racks.

Frequently Asked Questions

Q: What are the logic threshold levels and field power requirements for signal detection?

A: The input channels require a 24 VDC field supply (drawing 35 mA at idle and up to 259 mA with all 32 channels active at 7 mA per point). Logic high is detected at voltages above 15 VDC, while logic low is triggered below 5 VDC.

Q: How is input channel filtering adjusted on the module circuit board?

A: Signal delay times can be set to either 1 ms or 10 ms using onboard hardware DIP switches located directly on the module card assembly.

Field Installation Guidelines

1. Power off the target Series 90-70 rack chassis before inserting or extracting the input card.
2. Align card edges with the designated rack slot guides and slide the module back until the 64-pin DIN 41612 backplane connector fully seats into the chassis receptacle.
3. Fasten top and bottom panel retention screws to maintain chassis ground grounding and lock the module against mechanical vibration.
4. Wire 24 VDC external field power and sinking input points to the 48-pin front field connector block, maintaining separation from high-voltage AC cables inside wiring troughs.
5. Confirm correct field power supply polarity before energizing the 24 VDC loop circuit; internal continuous reverse polarity protection shields module hardware in the event of miswiring.